Black tips on the greater coverts and secondaries ... Juvenile: generally browner, lacks iridescence; orbital skin and feet gray. The rock pigeon was introduced from Europe by early settlers ...

Larger, with a longer tail than a rock pigeon; blue-gray on the upper parts ... Iris pale yellow; narrow orbital skin purplish; bill yellow with a black tip; and feet yellow.

"If the rock pigeon were a rare bird, birders would be lining up around the block oohing and "aahing" over them because ...